(19)
(11) EP 1 023 503 A1

(12)

(43) Date of publication:
02.08.2000 Bulletin 2000/31

(21) Application number: 98945650.4

(22) Date of filing: 17.09.1998
(51) International Patent Classification (IPC)7E01C 1/00
(86) International application number:
PCT/NO9800/278
(87) International publication number:
WO 9914/435 (25.03.1999 Gazette 1999/12)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 18.09.1997 NO 974300

(71) Applicant: Applied Plasma Physics AS
4305 Sandnes (NO)

(72) Inventor:
  • JOHNSEN, Torfinn
    N-4300 Sandnes (NO)

(74) Representative: Vigars, Christopher Ian et al
Haseltine Lake & Co.,Imperial House,15-19 Kingsway
London WC2B 6UD
London WC2B 6UD (GB)

   


(54) METHOD FOR CONTROLLING THE AMOUNT OF IONISED GASES AND/OR PARTICLES OVER ROADS, STREETS, OPEN SPACES OR THE LIKE